A study by the ULPGC endorses the quality of tap water for drinking and cooking

“We must banish the myth that tap water cannot be drunk or that it is not suitable for cooking, it is a concept that we have been carrying around for a long time. It is true that years ago its quality was not so clear, but today there is so much legislation In this regard, it is so backed and guarded, that it is completely safe and can be used in any home activity, it is perfectly drinkable, and unless the authorities announce at a certain time some specific issue advising otherwise, it can be drunk without any kind of problems ”.

However, it warns that despite the fact that the water is drinkable, each citizen is responsible for ensuring the good quality of the water they are going to consume, and for this they must take into account possible deficiencies in the installation of the pipes in their home – “For example, if they still have those of lead banned since 1975, because there are still buildings with this type of facilities” -; to the poor maintenance of cisterns or community deposits that causes leaks, growth of algae or proliferation of microorganisms. “We must bear in mind that we are also responsible for maintaining that water quality, for keeping the cisterns or drums clean, or making sure that the pipes at home are fine”, and points out that “if we drink tap water, we must use the filter jugs or filters appropriately changing them when necessary, wash the jug from the water … you have to keep it in good condition and take extreme hygiene as with any other food ”.

Filtering tap water is voluntary, it only affects the taste and not the quality of the liquid


On whether it is advisable to filter tap water for consumption, Rayco Guedes points out that it is voluntary, because it affects the taste and not the quality of the liquid. “Many people reject this water from the beginning because they say that it tastes bad, and mainly that bad taste is given by chlorine, since it is chlorinated to eliminate bacteria and others. By passing it through the filter jug, the flavor is changed because it removes the chlorine and salts that they may have -which are not a problem-. What the filter does is to resemble the flavor of bottled water to which we are more accustomed, but it is not mandatory or essential to use it, it is simply a matter of taste and flavor ”, he pointed out.


The researcher insists that “despite the boom in bottled waters with weak mineralization”, minerals are necessary for the proper functioning of the human body. “If your intake is reduced by consuming a weakly mineralized water, it will be necessary to obtain them through other foods”, and adds that the presence of some of these minerals, such as calcium and magnesium, is due to the circulation of water through Soils rich in these elements, and their concentration determines the level of hardness of the water. “Hard water can cause some domestic problems such as lime deposits in the pipes or a greater need for heat to heat the water. However, consumers can rest assured that hard water is not a health risk ”.

Regarding the reluctance to use tap water for cooking, the Iunat researcher points out that they are completely unfounded. “I have been making food with tap water for years, even coffee. It is true that the water from Santa Brígida, for example, which is more from a well or gallery, has a better flavor than that of the South zone which is desalinated, but with the filter jug ​​you can eliminate that flavor ”.

Taste, on the other hand, which is the only thing that differentiates some municipalities from others, with tap water being drinkable in all of them. “It is true that in the central area of ​​Gran Canaria desalinated water is mixed with part from galleries or wells, and there the amount of salt may be a little less, but there are no great differences”.

The specialist concludes that the myth that tap water is useless for drinking or cooking can be “completely” ended. “There are more than 20 different laws that ensure your safety. If we consider water as food, it is the most guarded of all that we consume daily ”.

Warns about reusing plastic bottles

In the article ‘Why can the quality of tap water deteriorate?’ Published by Rayco Guedes Alonso in the scientific dissemination platform The Conversation, the researcher in the area of ​​analysis of contaminants in environmental samples of the ULPGC warns about the use of plastic water bottles such as those purchased in a supermarket. “This plastic is not designed for us to reuse it. On the one hand, if we fill the container without washing it, there will be many possibilities that bacteria and other microorganisms will proliferate at levels higher than recommended ”. It also points out that, when washing the bottle with chemical products, residues can remain attached to the plastic that cause the water to acquire an unwanted odor. That is why he recommends glass or steel, easy to wash, or plastics suitable for reuse. Dr. Guedes insists that tap water is completely safe for consumption, since Spain has more than twenty orders, directives and royal decrees that regulate everything from the sanitary criteria of water for human consumption to the specific technical regulations for supplying water. drinking in a building. “All the activities involved in the purification process are regulated.”


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